EC Number | KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|---|
3.2.1.23 | 2.35 | - |
o-nitrophenyl-beta-D-galactoside | enzyme form 1 | Aspergillus niger | |
3.2.1.23 | 2.36 | - |
o-nitrophenyl-beta-D-galactoside | enzyme form 2 | Aspergillus niger | |
3.2.1.23 | 2.38 | - |
o-nitrophenyl-beta-D-galactoside | enzyme form 3 | Aspergillus niger | |
3.2.1.23 | 85 | - |
lactose | enzyme form 1 | Aspergillus niger | |
3.2.1.23 | 105 | - |
lactose | enzyme form 2 | Aspergillus niger | |
3.2.1.23 | 125 | - |
lactose | enzyme form 3 | Aspergillus niger |
EC Number | Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|---|
3.2.1.23 | 124000 | - |
enzyme form 1, gel filtration | Aspergillus niger |
3.2.1.23 | 150000 | - |
enzyme form 2, gel filtration | Aspergillus niger |
3.2.1.23 | 173000 | - |
enzyme form 3, gel filtration | Aspergillus niger |
EC Number | Organism | UniProt | Comment | Textmining |
---|---|---|---|---|
3.2.1.23 | Aspergillus niger | - |
- |
- |
EC Number | Posttranslational Modification | Comment | Organism |
---|---|---|---|
3.2.1.23 | glycoprotein | enzyme form 1 contains 13.5% w/w neutral carbohydrate, enzyme form 2 contains 19.2% w/w neutral carbohydrate, enzyme form 3 contains 28.5% w/w neutral carbohydrate | Aspergillus niger |
EC Number | Purification (Comment) | Organism |
---|---|---|
3.2.1.23 | 3 enzyme forms | Aspergillus niger |
EC Number | Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|---|
3.2.1.23 | 23.1 | - |
enzyme form 1 | Aspergillus niger |
3.2.1.23 | 77.5 | - |
enzyme form 2 | Aspergillus niger |
3.2.1.23 | 82.4 | - |
enzyme form 3 | Aspergillus niger |
EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
3.2.1.23 | lactose + H2O | - |
Aspergillus niger | D-glucose + D-galactose | - |
? | |
3.2.1.23 | o-nitrophenyl-beta-D-galactoside + H2O | - |
Aspergillus niger | o-nitrophenol + beta-D-galactose | - |
? |
EC Number | pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|---|
3.2.1.23 | 3 | - |
enzyme form 1, 2 and 3, hydrolysis of lactose | Aspergillus niger |
3.2.1.23 | 3.2 | - |
enzyme form 3, hydrolysis of o-nitrophenyl-beta-D-galactoside | Aspergillus niger |